Technical Bulletin
Bulletin No: TCH-008-030-A Effective Date: 4/12/99 Cancels: N/A Page: 1 of 3
Subject:
UPGRADED AD-9 MAINTENANCE KIT
This is to announce the availability of a new, upgraded maintenance kit for the AD-9 air dryer. The new kit,
5005037, replaces the obsolete 5004336 kit.
The change in the kit brings the purge valve up to new design standards. An optimized seal design increases the
air dryer’s resistance to freeze-ups and reduces mechanical sticking of the purge piston. The kit’s assembly tool is
required for inserting the new purge piston.
The new kit has been in production since October 1998. Refer to Installation Instructions (BWS1065) for kits
5005037, 5005893, 107794 and 107796 when using the 5005037 AD-9 maintenance kit.
Kit Contents
Kit 5004336 (Old)
Kit 5005037 (New)
Description Qty.
Key Description Qty.
O-Ring 1
1 Shoulder Bolt 1
¼” Tapping Screw 3
2 Piston Guide 1
¼” Lock Nut 1
3 ¼” Tapping Screw 3
O-Ring 1
4 ¼” Washer 3
Barium Grease 1
5 Purge Valve Complete 1
Purge Valve Complete 1
6 Return Spring 1
O-Ring 1
7 Purge Piston Assembly 1
O-Ring 1
8 Quad Ring 1
O-Ring 1
9 O-Ring 1
Quad-Ring 1
10 O-Ring 1
Purge Piston Guide 1
11 O-Ring 1
Piston Return Spring 1
12 Assembly Tool 1
Shoulder Bolt 1
Barium Grease (not shown) 1
Installation Instructions 1
Installation Instruction (not
shown) 1
Note:
• Kit 5005037 is the hard seat piston
• Kit 5005893 is the soft seat piston
Kit 5005037
(numbers correspond to chart on page 1)
Purge valve
housing assembly
(not included)
Wire Harness
Connector
6
7
8
9
10
12
3
4
1
2
5
11
Upper Bracket Strap
5/16” x 4-1/2” Upper
Bracket Cap Screw
5/16”
Lock Nu
t
5/16” Lock Washer
Upper Mounting Bracket
Housing
Lock Nut
Desiccant
Complete
Cartridge
O-Ring
O-Ring
Safety
Valve
3/8” Special
Washe
r
End Cover
3/8” Cap
Screw
3/8”
Special
Washer
Lower Mounting
Bracke
t
Check Valve Assembly
3/8” Cap
Scre
w
3/8” Special Washer
O-Ring
Wiring Harness
Connector
Seal
11
10
9
3
4
Exhaust
Cove
r
EXTENDED EXHAUST COVERS
OLD VERSION NEW VERSION
-
1
-
2
-
3
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